British Journal of Ophthalmology (Impact Factor: 2.81). 07/1965; 49:312-4. DOI: 10.1136/bjo.49.6.312
Source: PubMed
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    ABSTRACT: There has long been concern in terms of the validity of assessing vision in children with profound and multiple handicaps who are developmentally young. The problem is that, in assessing any specific capacity, most assessment tests rely on the integrity of other aspects of development. Also, conventional tests may not produce educationally relevant data or contain material which is intrinsically interesting to children with profound learning difficulties. This paper reviews the issues relating to the assessment of vision in such children, and demonstrates a standard technique for grading near vision using food items of varying size.
    British Journal of Learning Disabilities 03/2009; 19(1):14-19. DOI:10.1111/j.1468-3156.1991.tb00611.x · 0.26 Impact Factor
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    ABSTRACT: Two methods to measure visual acuity in children aged 18 months and upwards are described, the Kolt-test and the O-test. The validity of the tests was evaluated. These new tests are based on the ability of small children to identify symbols of increasing complexity as they grow older. Thus, a circle is recognized at 12 months, and a cross at about 24 months, while recognition of a triangle and a square comes in between. Correct performance is rewarded. Simplified procedures permit testing children with visual acuity below 0.1 (6/60, 20/200). The tests may also be used in mentally retarded persons if conventional methods fail.
    Strabismus 01/1996; 4(1):15-23. DOI:10.3109/09273979609087733
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    ABSTRACT: Evidence of atypical perception in individuals with ASD is mainly based on self report, parental questionnaires or psychophysical/cognitive paradigms. There have been relatively few attempts to establish whether binocular vision is enhanced, intact or abnormal in those with ASD. To address this, we screened visual function in 51 individuals with autistic spectrum disorder and 44 typically developing individuals by measuring visual acuity, stereoacuity, convergence, divergence, ocular motility, incidence of strabismus and integrity of the optokinetic response. The data suggest that many aspects of vision, including visual acuity, are unaffected in ASD, but that convergence is an aspect of visual function that merits further research in those with ASD.
    Journal of Autism and Developmental Disorders 03/2009; 39(7):965-75. DOI:10.1007/s10803-009-0705-8 · 3.06 Impact Factor


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